Physical and Chemical Changes Study App | Class 7 Science Quiz e-Book PDF

Class 7 Science MCQs (Grade 7) From Textbook

Class 7 Science Certification MCQs – Practice Test 19 (Chapter 17)

Physical and Chemical Changes Quiz with Answers PDF Download – Test 19

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Learn Physical and chemical changes Quiz Questions and Answers PDF. Download the Physical and Chemical Changes Quiz PDF e-Book, Ch. 17-19 to learn Class 7 Science Course. Solve Making Ammonia MCQs PDF, Physical and Chemical Changes Quiz Questions and Answers to strengthen science skills. Download Physical and Chemical Changes Quiz App: Free Class 7 Science Study App to learn making ammonia, solids liquids and gases, iron and sulphur, burning fuels test prep for science digital learning portals.

Free Physical and Chemical Changes Quiz App (iOS & Android) with MCQ: "Nitrogen is obtained from"; with answers: liquefied air, gaseous air, solidified air, and air spaces in soil to strengthen science skills. Study Making Ammonia MCQ Questions, download Google Book (Free Chapter) to master revision techniques.

Physical and Chemical Changes Quiz – Practice Test 19 PDF Download

MCQ 91: Nitrogen is obtained from:

  1. gaseous air
  2. liquefied air
  3. solidified air
  4. air spaces in soil

MCQ 92: The reason of low density of gases is:

  1. number of particles per unit area
  2. number of particles per unit volume
  3. mass per unit area
  4. mass per unit volume

MCQ 93: The reaction that gives out heat, while taking place is known as:

  1. exothermic reaction
  2. endothermic reaction
  3. reversible reaction
  4. substitution reaction

MCQ 94: The 'volume' of gases is:

  1. indefinite
  2. definite
  3. dependent
  4. reduced

MCQ 95: The compounds made up of hydrogen and carbon are known as:

  1. carbohydrates
  2. hydrocarbons
  3. alkanes
  4. alkenes

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